Hoard of 1,400 Works of Art Triggered International Outcry

BERLIN—Cornelius Gurlitt, the octogenarian son of one of Adolf Hitler's major art dealers, died in his Munich home on Tuesday morning, leaving the fate of his roughly 1,400 artworks unclear.

Legal questions now abound over how—and even if—Nazi-looted works in the collection could be returned to Holocaust victims and their heirs. It is uncertain whether the collector, who was never married and had no children, left a will. The...